Daniel, when you import objects, the permissions do not travel with the object. They instead will get the permissions you have set in the new mdb for 'New Tables/Queries, New Forms, etc.'
You might find Jeff Conrad's utility helps in transferring the permissions. First item at http://www.accessmvp.com/SDaigle/index.htm

Signature
Joan Wild
Microsoft Access MVP
:I have recently experienced major issues importing objects from one secured
: db into another, so much so that the imported objects will not display and I
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: Daniel Pineault